Linearly polarized 'fine structure' of the bright exciton state in individual CdSe nanocrystal quantum dots

被引：56

作者：

Htoon, H. ^{[1
]}

Furis, M. ^{[2
]}

Crooker, S. A. ^{[2
]}

Jeong, S. ^{[1
]}

Klimov, V. I. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Ctr Integrated Nanotechnologies, Div Chem, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Natl High Magnet Fields Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.77.035328

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report polarization-resolved, low-temperature, high-spectral-resolution studies of the photoluminescence from individual CdSe nanocrystal quantum dots (NQDs). The spectra reveal a 'fine structure' splitting of the bright exciton state in a subset of the studied NQDs. The two fine structure states are spectrally separated by an energy of up to 3 meV depending on NQD size and are characterized by linearly (and orthogonally) polarized emission dipoles. The average splitting scales approximately with inverse NQD volume, consistent with an anisotropic electron-hole exchange interaction which can result from a breakdown of cylindrical symmetry in some of the NQDs.

引用

页数：7

共 50 条

[21] Exciton recombination in the coupling structure of a ZnCdSe quantum well and CdSe quantum Dots [J].

Department of Security and Prevention, Chinese People's Public Security University, Beijing 102416, China ;

不详 .

Pan Tao Ti Hsueh Pao, 2008, 11 (2252-2255) :2252-2255

[22] Revealing the Exciton Fine Structure of PbSe Nanocrystal Quantum Dots Using Optical Spectroscopy in High Magnetic Fields [J].

Schaller, R. D. ;

Crooker, S. A. ;

Bussian, D. A. ;

Pietryga, J. M. ;

Joo, J. ;

Klimov, V. I. .

PHYSICAL REVIEW LETTERS, 2010, 105 (06)

[23] Cryogenic Single Nanocrystal Spectroscopy: Reading the Spectral Fingerprint of Individual CdSe Quantum Dots [J].

Fernee, Mark J. ;

Sinito, Chiara ;

Louyer, Yann ;

Tamarat, Philippe ;

Lounis, Brahim .

NANOPHOTONICS V, 2014, 9126

[24] Band-Edge Exciton Fine Structure of Small, Nearly Spherical Colloidal CdSe/ZnS Quantum Dots [J].

Moreels, Iwan ;

Raino, Gabriele ;

Gomes, Raquel ;

Hens, Zeger ;

Stoferle, Thilo ;

Mahrt, Rainer F. .

ACS NANO, 2011, 5 (10) :8033-8039

[25] Two-Dimensional Electronic Spectroscopy Reveals Dynamics within the Bright Fine Structure of CdSe Quantum Dots [J].

Brosseau, Patrick ;

Jasrasaria, Dipti ;

Ghosh, Arnab ;

Seiler, Helene ;

Palato, Samuel ;

Kambhampati, Patanjali .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2024, 15 (06) :1702-1707

[26] Detection of Bright Trion States Using the Fine Structure Emission of Single CdSe/ZnS Colloidal Quantum Dots [J].

Fernee, Mark J. ;

Littleton, Bradley N. ;

Rubinsztein-Dunlop, Halina .

ACS NANO, 2009, 3 (11) :3762-3768

[27] Exciton radiative lifetime in CdSe quantum dots [J].

Ji, Zhimin ;

Song, Zhigang .

JOURNAL OF SEMICONDUCTORS, 2023, 44 (03)

[28] Observation of the 'dark exciton' in CdSe quantum dots [J].

Phys Rev Lett, 20 (3728)

[29] OBSERVATION OF THE DARK EXCITON IN CDSE QUANTUM DOTS [J].

NIRMAL, M ;

NORRIS, DJ ;

KUNO, M ;

BAWENDI, MG ;

EFROS, AL ;

ROSEN, M .

PHYSICAL REVIEW LETTERS, 1995, 75 (20) :3728-3731

[30] Exciton radiative lifetime in CdSe quantum dots [J].

Zhimin Ji ;

Zhigang Song .

Journal of Semiconductors, 2023, (03) :108-117

← 1 2 3 4 5 →